Benchmarking LLVM/Clang 3.2, GCC 4.8, DragonEgg Compilers

When starting with HMMer, GCC (both 4.7 and 4.8) are much faster
than LLVM or even when using GCC with DragonEgg. It seems LLVM's optimizers are
not as good as GCC's for this scientific benchmark. When DragonEgg was used while
also enabling the GCC optimizers, the performance returned to nearly matching
that of the vanilla GCC.

MrBayes was also the fastest with vanilla GCC over LLVM in any
configuration -- Clang or DragonEgg. When attempting to use the GCC and LLVM optimizers
with the extra compiler switch, the build failed.

LLVM finally comes out ahead when it comes to the KASUMI test
within the Botan crypto library. LLVM with the Clang compiler front-end did the
best while GCC with DragonEgg also was close with its performance and well ahead
of a plain GNU Compiler Collection setup.

The other Botan crypto tests were mixed for who has the best compiler
on the Intel Core i7 Linux setup.